简斯在连续体中与不对称的拓负荷相结合的状态
Meng Kang1, Meng Xiao2,3, C T Chan1
1The Hong Kong University of Science and Technology, Department of Physics and Institute for Advanced Study, Hong Kong, China.
Physical review letters
|February 6, 2025
概括
我们在连续体 (BICs) 中引入了Janus绑定状态,新的拓缺陷与不对称的辐射电荷. 这些Janus BIC提供了对光-物质相互作用和芯片上的奇拉器件的增强控制.
科学领域:
- 光子学 是一个光子学.
- 凝聚物质物理学 凝聚物质物理学
- 拓学光子学 拓学光子学
背景情况:
- 光子晶体板 (PCS) 通常表现出镜像对称性.
- 连续性的边界状态 (BIC) 是具有无限质量因子的独特光学状态.
- 控制BIC属性对于先进的光子设备至关重要.
研究的目的:
- 提出并证明一种新的拓缺陷:连续体中的Janus 束状态 (BICs).
- 为向上和向下辐射通道设计不对称的拓电荷.
- 在光物质相互作用和芯片上的设备中探索Janus chiral BICs的潜力.
主要方法:
- 使用具有初始镜面对称性的光子晶体板 (PCS).
- 引入扰动以打破外平面镜面对称性,将BIC分解为循环极化状态 (C点).
- 操纵 C 点在 Γ 点 BIC 汇合,形成 Janus BIC,并进一步细化 Janus 合性 BIC 的内平面对称性扰动.
主要成果:
- 形成了Janus BICs,对上向和下向辐射具有明显的拓电荷.
- 将非-I BIC分解为四个C点,保持在-I BIC的状态.
- 创建具有无限Q因子,大内在性和明显的Pancharatnam-Berry阶段奇点的Janus性BIC.
- 对轨道角动量的控制和增强的方向依赖和旋转依赖的光物质相互作用的演示.
结论:
- 斯BICs代表了一个具有不对称辐射特性的新型拓缺陷类别.
- 雅努斯性BIC为性依赖的芯片设备和先进的光操纵提供了显著的潜力.
- 这项工作为控制轨道角动量和不对称的光物质相互作用提供了新的途径.
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